Service & Maintenance

Growing Your Business Through IAQ Particulate Profiling

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Concern about indoor air quality (IAQ) is driving customers to have their IAQ situation assessed and, if necessary, repaired. IAQ has generated so much awareness that you may want to consider offering IAQ assessments to all of your customers as an extra service.
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Btu Buddy 29: Outdoor Unit With Restricted Airflow

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In this edition of the Btu Buddy series, Bob finds an outdoor unit that has been enclosed by a deck. Bob and Btu Buddy come up with a temporary solution to restore adequate cooling and determine where to relocate the unit.
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Quick Facts: Evacuation

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This article discusses the purpose of evacuating a refrigeration system and how low a vacuum is needed to properly evacuate a system.
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Btu Buddy 28: A Stopped Up Condensate Line

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In this installment of the Btu Buddy series, Bob's customer has a major problem with a condensate leak. Btu Buddy assists in solving the problem and suggests what to do to prevent a reoccurrence.
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Checking Indoor Airflow

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Indoor airflow in any air conditioning system is critical. Too much air and the customer suffers lack of dehumidification in cooling. Too little air in cooling may freeze the coil. Here are procedures on how to measure airflow.
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Btu Buddy 27: A Compressor With Internal Leak

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In this edition of the Btu Buddy series, Bob's cooling system service call seems to be a classic case of low charge. With Btu Buddy's help, he discovers that it's actually a compressor problem.
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Quick Facts: Superheat And Subcooling

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Supeheat and subcooling are two terms that every service technician should know. Here are some quick facts on what they are and why they're important.
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Noncontact Temperature Measurements Using IR Thermometers

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Infrared (IR) thermometers make it safe to take surface temperature measurements of items like rotating, hard-to-reach, electrically live, or dangerously hot targets. For preventive maintenance tasks, they cut measurement time to almost zero with the ability to take a surface temperature reading in less than one second.
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Btu Buddy 26: Checking A Heat Pump With Dirty Indoor Coil

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In this installment of the Btu Buddy series, Bob examines a heat pump system and finds the airflow is low. He discovers that the problem is a dirty coil.
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Avoiding TXV Trauma

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To ensure maximum TXV performance, here are some tips on bulb mounting/location, brazing, valve orientation, external equalizer use, superheat adjustment, and troubleshooting.
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